Yea, I had a Plymouth Breeze with a funky cruise control that would randomly decide you weren't going fast enough. All the sudden the car would start to accelerate all by itself, and you couldn't turn off cruise. The breaks would still stop the car.
I have a great uncle that did that up in Michigan. This was back in the 70's though. Got a bit tipsy, so he drove himself home, in the break down lane. State trooper stopped him and asked him if he was drunk. "Hell yea I'm drunk, why do you think I'd doing 5mph in the break down lane!"